Fender-bending machine.



F. A. LUNDAHL.

FENDER BENDING MACHINE. APPLICATION FILED SEPT-6.1911.

1,296,199. Patented Mar. 4,1919.

4 SHEETS SHEET I WMMUM! W 1 W dwouaw I F. A. LUNDAH-L.

FENDER SENDING MACHINE.

APPLICATIION FILED SEPT. s. 19H.

4 $HEETS-SBEET 2- 1,296,199. Patented Mar. 4,1919.

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W zoo aw $444M 1 FENDERBENDING MACHINE.

APPLICAHON FILED SEPT. a. 1912.

F. A. LUNDAHL.

Patented Mar. 4,1919.

4 SHE'ETSSHEET 3- swam wow F. A. LUNDAHL.

FENDER BENDING MACHINE.

APPLICATION FILED SEPT. 6. 1912.

1 95,199. Patented Mar. 4,1919.

. 4 SHEETS-SHEET 4.

STATES PATENT OFFICEQ? FRED n. LUNDAI-I'L, or eme, ILLINOIS.

FENDER-BENDING MACHINE. v 1

line, in the'coun-ty of Rock Island and State of Illinois, have invented certain new and useful Improvements ,in "Fender-Bending Machines, of which the following is a specification.

My injven tion has reference to, fender bending machines, and pertains more specially'to devices for formingthe sheet-metal fenders which are used to forma guard for the Wheels of automobiles and similar vehicl'es. Such fenders are provided with a doublecur'vature, one longitudinally'of the shield 1 and theot'her transversely thereof, and it is customary to give the desired form to the fender while the metal is in a cold or unheated condition. On this account it is necessary to give the'fender its longitudinal curvature by asuccession of operations, resulting in a gradualreduction thereof to the desired shape, stretching of the material, which would tend to break-or distort the fibers thereof. The present invention has to do 1 largely with I means for producing the desired amount of curvatureof the metal, by gradually increasing the degree ofcurvature thereof. r In the drawings: Figure 1 shows a machine embodying my invention in front ele vation, with some of the parts omittedto more clearly exemplify other parts thereof. Fig 2 is a vertical section on the line 00-00 of Fig. 1. Fig. 3 is a vertical section on the Fig. 4: is a plan view of my invention with some of the parts broken away. Figs. 5' and 6 are diagrammatic views of the forming devices in different positions.

" Similar parts are indicated by correspond ring reference characters throughout the several figures' The frame of the machine'consists of side pieces 1 and 2, supported on an Igbeam base with a vertical recess 4, inth'e bottom of .Which is a boxing 5 -in,wh1ch is rotatably mounted the end. of a shaft 6.- Centrally of engaging drums to preventundue tension or V i Projected between thecollars 3. Each of the s1de-pieces is provided V I v p 28. in meshwith an 1dler gear-wheel 29 on a V Specification of Letters Patent; PatentediMaf; 4; 19151 Application filed September 6,1917. .Seri a1No.19 0,02ii.

the machine there is fixed on said shaft a comiave roll .7, having annular flanges 8. Above the boxing5 is. supported a boxing 9 in whieh'jis-journaled a shaft; 10, similar to, the shaft 6,and provided Witha roll 11,-having a convex face adapted to cooperate with .the roll 7 to giveto a metal fender the desired amount of curve, transversely thereof. Journaled in the. top of the frame is a main drive shaft 12, on which isloosely supported a, pair of pulleys-13 and 14:; to, -which movement is imparted in any known manner to cause a continuous rotation thereof in opposite directions. Fixed to the shaft'12 is a pair of [leeves'15 and 16 adaptednto be operatively connected withthe' pulleys 13 "and "14 'bymeans of 19 and 20 rigidly connected with said pulleys. Slidable on the shaft 12 isapair'of'collars 21 and 22 provided with arms 23 and 24: having-a connection with of a conve tional-pattern, and nothing "herein claimed broadly thereon;- p p 21 and 122" is an arm 25 secured at its forward" end to'a shift-bar '26 slidably mounted on the top of the machine, and'provided with an arm 27 extending to'the sideof the' machine, and designed 'to be connected up Withsuitable hand or footmechanism for' moving the bar 26 in either direction, at will. The 'move- 'ment of such shift-bar in one direction will cause the arm 25' to move one of the collars '21 or-22 outwardly, throwing the'shaft into en agement with he corresponding pulley 13 or 14:,and imparting to the shaft 'a rotary movement similar to that of the pulley with shift-bar in the opposite direction has a contrary effect, causing a rotation of the shaft in the opposite direction. g V

On: one end of the shaft 12 is 'a gear wheel shaft 30, thewheel 29 being in-meshwitha gear-wheedifil on one end of r the shaft "10. A rotary movement of the shaft 12 may thus be imparted to the shaft 10,

'to cause a rotation thereof similar to that of the shaft 12. On the opposite end of the shaft 12 is a gear-pinion 3-2 communicating by means of a pair of idler gearwheels 33 and 34 with {a gearwheel 35 on 7 one end of the shaft 6. Movement of the shaft 12 is thus imparted to theshaftfi to cause a rotation thereof opposite to that V of the shaft 10.

Supported in front of the machine is a feed-table 36, along which the, sheet metal plates from which the fenders are formed are moved in the direction of the rolls 7 and 1 1, the fenders being at this time, in the form of flat plates, with upwardly turned flanges on their edges. .The table tinue the 36 is provided with upwardly turned edges 37 by means of which the metal plate is guided into the rolls. The flanges 8' conguidance of such plate in a straight line.

7 and attached to said chute. The upper face of thechute'is concaved to conform with thecurvature of the rolls 7 and 11, whereby said chute is adapted to receive a plate :heads 43, perforated to which has been passed through the rolls.

he sharp edge of the chute 41 rests normally on the roll 7 at a point in rear of a vertical line passin medially of said roll. :In the rear ends 0 the ways 38 are crosspermit the passage of rods 44, fixed to the blocks 39, and provided on their rear ends with rollers 45. Said rollers are engaged byeccentrics 46 on a shaft 47 journaled in hearings-48 fixed to the side-pieces land 2. Rotation of such shaft causes the eccentrics thereon to move the rods 44 upwardly, elevating the rear end of the chute 41, for the purpose hereinafter more fully set forth. f

On one end of the shaft 47 is a gearpinion 49 engaged by a gear-rack 50-slid-' able in a bearing 51 secured to the frame of the machine. Fixed to the side-piece 2, near the front thereof, is a bracket 52, on which is fulcrumed a bell-crank lever'53, the short arm of which is connected by means ofa rod 54 with'therack 50. segment 55 is provided with a series of teeth 56, engaged by a spring=controlled pawl '57 pivoted to the lver=53 convenient to the handle 58 thereof When the oper ator" moves such handle inwardlyv the pawl 57 slips over the teeth 56, engaging'the one at which it is stopped. This operates ,to move the rack 50 forwardly, turning the wardly and forwardly. This movement is accompanied by a correspondin movement of the shaft 40 and rear end o the chute, operating to give asharper curve to the fender, as indicated in Figs. 5 and 6, the fender being represented therein by the broken lines. In Fig. 5 the chute is shown eccentrics 46 and moving the blocks 38 up- 7 the chute, receiving agreater degree of curvaturetherefrom. c After the metalsheet has beenrfirst open ated on, so as to be given a slight amount of curve, the movement of the machine is reversed by action of the shift-bar 26, and a the plate is returned forwardly th'rdugh the rolls. Coincidentally with this forward movementthe shaft 47 is rotated sufficiently to partially raisethe chute 41-, whereupon the movement of the machine is again reversed and the plate again operated in a rearward direction, giving an additional bend. thereto. "lhis operation iscontinued until'the desired curvature of the ,plateis attained. In each succeeding operation the lever 53 is moved a little farther inwardly, the pawl 57-passing over one or more additional teeth at each. succeeding movement.

The operator soon becomes skilled 'in the operation of the machine, and is able to determine the amount of additional elevation to be 'givento the chute 41 -for each operation.- Ifdesired the teeth-56 can be numbered or otherwise indicated bysuitable marks, so asto assist in the proper eperation of the lever. V

' The short arm of the lever .53 is provided with a series of openings 59, for adjust ment of the end of the rod 54, to give the rack 50 a sired. I

' What I claim as my invention, and desire to' secure by Letters Patent of the United States, is

greater or less movement, as de- I A device of the class desci-bed, compris- -iing a frame; a pair ;of rolls cooperatively mounted therein and adapted to impart to a sheet of metal a desired amount of curv atime transversely thereof; a :pair of blocks slidably movable at opposite sides of said frame so as to move inwardly and upwardly or the reverse; .a shaft supported in said blocks; a'forming membersupported by said shaft and having oneof its edges slidably held on one of said rolls; a shaft rockdirecting a sheet of metal to said rolls at a ingly mounted in said frame; a pair of ecright angle thereto. 10 centrics on said shaft operatively connected In testimony whereof I affix my signature with said blocks to impart a sliding movein the presence of two Witnesses.

ment thereto; means for suitably actuating FRED A. LUNDAHL. said rock-shaft; means for rotating said Witnesses:

rolls in opposite directions; means for re-. W. N. HASKELL,

versing the rotation thereof; and means for ELEANOR HEIDER.

copies of this patent may he obtained for jive cent: each, by tddre'ising the Gqxnmissioner o! latent,

Washington, D. 0." 

